Pile-lifting jack



H. H. URQUHART.

FILE LIFTING JACK.

APPLICATION FILED FEB. 16, 1921.

1,410,968. Patented Mar. 28, 1922.

misses.

this Y specification,

.- i if STATES HENRY HUDSON oncgunmntn, or sT. moors, Missouri-i,Assrenon JOHN w. MYER'sco eH,

rim-unwind JACK v Application filed February re, 1921.

a citizen of the United'States, residing at St. Louis city andState of-Missouri have. invented a new and usefulPile-Lifting Jack, of which thefollowing is a specification.

This invention relates to j acks adapted to pull piles or sheet pilinga'nd concrete forms out "of the ground.

Objects of the inventiol are to provide :a jack which is quicklyadjustable, whichus operated witha in'inimuin of labor, which will savethe material, and which will :pull forms ordinarily left in thegrounchbecau'se o'fa lack oflsuch device.

The invention also .provides means whereby concrete forms of alldescriptions mayfbe wrecked. g

The invention will be best "understood from "a consideration of thefollowing detailed description taken in connection with the accompanyingdrawing forming part of with "the understanding, however, that theinvention. is not confined to any strict conformity with the showing inthe fied so long as such changes and inodifica- .tions mark nomateria'ldeparture from'the salient featuresof the invention 'as expressed in theappended claims. I

"In the drawing: g i I Fig. 1 is a perspective view of the '1mprovedpullingand lifting tool.

V. Fig. 2 is a verticalsectional viewof the same on an enlarged scale,parts being broken away. l Fig.8 is a horizontal sectional view. Fig.4is a perspective viewnf one form of chain receiver. i i

"Fig. 5 is a siinilar View of a slightly modifled former the chainreceiver;

The invention "includes a base 10, to which a pairnf standards 11 "aresecured, the standards preferably being castalong with its base.'ea'chhas a channel 12. on itsinner face, and a slot 13*extendinglongitudinally'of each "standardthe c. grea=ter part of the lengththereof. Slidably received within each-Chanone longitudinal edge. Eachbar 14 1 1215; a plurality of tapped bores 17 for receiving a s ecificaton Quarters "Patent.

Ta passageway is provided ch'ainreceiver drawing, but may be changed andmochbe varied. i The head These standards are parallel and;

or srr. Louis, MISSOURI.

'seriai No. 445,478.

responding slot '13 whereby the two 'barsare held in their channels. i fEach of the standards along one edge is provided with a pair of-spacec'le'airs 18 a1j1'd between said ears for the swinging of the rack engaging"end 19. A spring' 2l beer's against the part 20 so 'as 'to i normally*held said 5 part in the channel 12 and' hence in 'en gage'nient withthe teeth 15. At theupper end and im t'erniedi'ate of eaclrbar 14 toreceive a lltlid le 24. The 'otherend'ofthe rock "arm is proor ONE-TENTHro.

- Patented Mar. 2 8, 1922.

parrsnf pei'forations '22 are provided, -the perforations of alinementwith each other horizontally. w Pivots-11y "mounted between the bars 14,by trunnions insertible ili'toeither "pair of perforations isa rock arm23 havi ing socket in one end 'v'ided with a square -socket 25into whichthe 1' ne'ckof a. chain'receiver fits. The twofo'in s "ofch'alnreceivers, as shown 1n Figs. 4"and5, arealike 111 that each includesasquare shank or neck that is "perforated to receiye a bolt 27 passingalso through the rock arm. The? 26 is shown 'as having threeperforations 29 wherebythe extent of iftspm jection beyond the end ofthe rock arm-ma of the cha'i-h receiver plurality of claws 28, thelinlrsof a chain. The chain receiver 26 two pairs of these claws on oppositesi es.

The rock arm has gudgeons or trun- 1110118 .p'ro]ect1'ng. from oppositesides and including the enlarged portions 32 whl'clrare substantiallyfrusto eon'ical in shape andthe reduced cylindrical portions which erereceived within hearings in the "bars 14:. The

rock arm swings between the standards independently ofth'e position ofthe berswith' respect to said st'anderds.

may be. Then above the ground ertthersupp'irt'is adjustedbymisin er'loerin' the bais l. The pull upward y on"eit'lier :a'r willhdrf with Thechain receiver 3Q has a single pair 31 projecting longitudinally.

the iiives v aws 1 00 of either of the heads 26 or 3Q, ai"s*the" ase theheight '0" "the reek arin it the rack $1 1511 "and the other rend 20 ofthe. detentorvpawl moving outwardly as each tooth comes in contacttherewlth; WVhen the desired adjustment "itainedfthe paws or ,detentswill hold the hand rock :arm will the" i'ackbars should firstbe adjustedin I ,Thu's little by littlethe most stubbornly reover again.

.tainedconcrete form will be-pulled out of the ground, whereupon theform may be used :The device saves time, labor andmatorlalandis usefulnot nerely in pulling the-objects out of the ground but wherever, heavybeams, girders or the like i must be lifted a short distance. ,The rockarm 23 is rotatable between the standards so that if the v, the rockarm,

handle is removed the arm may be reversed to workon either side of thetoolwithout shifting its position.

i What is claimed is: .1. Ina device of the character described,

.a support, a pair of rack bars vertically adjustable onthe support,able between the rack adjustable thereon, a handle on one end of a rockarm swingably carried upon the vother end and ad- V figjustable toextendthe effective length of saidarrn. In a device of thecharacter described,

va support, a -pa1rofrack bars vertically adjustable on the support,:;;rock arm swingable between the rack bars and vertically adjustablethereon, niprovided onafthe support and-also on the and cooperatingmeans rack bars WherebyTthe height to which the zbarsmay extend abovecontrolled, said 'eans also servingto hold.

saidsupport can be the bars to the support.

In a device of the characterdescribed,

a support, apalr of rack bars verticallyarljfustable on the support,arock arm swingvided on the supportland' also on the, rackablebetweentherack bars andvertically adjustable; thereon, cooperating means projbarswhereby the height to which the bars ..may extend-above said supportcan-be conably carried upon trolled, said meansalsoserving to hold thebars tothe support, a handle on one end of the rock arm, and a chainreceiver adjustthe other. end 1 and ad-l justableftoextend the effectivelength "of i said arm.

.- 4.In a device of character described.

, a base, a pair of parallelivertical standards ,rising from the base,-z -channelled and; slotted bar slidable in each" channel, means on eacheach standard being longitudinally, a rack has been obbe moved bypushing downand engaging 'taining the bars and vertically i removableand and a chain receiver adjust ingthe' position 0f the rocklongitudinally channell tainthe bar in its channel and act as a stop forthe bar, and means on each standard and engaging with'the teeth of therack for maintaining the bars: in adjusted vertical positions.

n 5. ln a deviceof the character described, a base, a pair of parallelvertical standards risingyfrom the base, each standard being channelledand slotted longitudinally, a rackfbar s'lidable inzeach channel, meanson each bar and cooperating with the slot to maintain the bar in itschannel-and act as a stop for the bar-,means on eachstandard with theteeth of the rackfor maintaining the bars in adjusted verticalpositions, and a'rock arm revolubly mounted between the rack bars.

6. In a device of the a base, a pair of parallelvertical standardsrising from the base, eachstandard being channelled and slottedlongitudinally,a rack bar'slidable in each channel, means on each barand cooperating with the slot to maintain the bar in its channel and actas a stop for the'bar, means on each standard and'engaging with theteeth of the rack for bars in adjusted vertical positions, and a rockarm' revolubly mounted between the rack bars, said rock arm carrying aremovable handle at one end and a longitudinally adjustable chainreceiver at the other .end.

mainl 7. In a device ofthe character described,

a base, a pair of parallel vertical standards rising from the base, eachstandard being channelled and slotted longitudinally, a rack barslidable in each channel, means on each bariand cooperating With theslot to maintain the bar in its channel and act as a' stop for the bar,means on each standard and engaging with the teethfof the rack formaintaining the bars in adjusted vertical positions, a; rock armrevolubly mounted between the rack' bars,

and means for'adjustarm longitudinally of the rack bars 7 1 8. In adevice of the character described, a base,'a pair of-parallel vertical-stan'dards rising'from the base, each standard being channelled andslotted longitudinally,'a rack bar slidable in eaeh channel, meansonf'each bar and cooperating with the slot-to maintain the bar in itschannel and act as a stop for the bar, said means being adjustable ofthe' bar whereby the extent-"to-which the bars may be raisedxcanbevaried, and means on each standard and engaging with the'teeth ofthe-rack for maintaining the bars in adjusted vertical positions. i V

- 9. Ina device of the character described, I

a base, a pair ofiparallel vertical standards rising from the base, eachstandard being d and: slotted longitudinally, a rack bar and cooperatingwith the slot tmnaim/bai slidable along said standard, and means on eachbar and cooperating with the slot arm having av removable handle at oneend 10 to maintain the bar in its channel and act and a removable chainreceiver; said chain as a stop for the bar, means on each standreceiverbeing mounted so as to extend the arc]. and engaging with the teeth ofthe effective length of the rock arm.

rack for maintaining the bars in adjusted In testimony that I claim theforegoing vertical position, and a rock arm revolubly as my own, I havehereto afiixed my signa- 15 mounted between the rack bars and capableture.

of being positioned at different points intermediate the length of saidhere, said rock HEN HUDSON URQUHART.

